Raging Rabies

This card can not be countered. Enchanted creature gets +X/+X (X is the total mana cost of all creatures on the battlefield), gains deathtouch, hexproof, and indestructible, deals damage equal to its power to any number of targets, and dies at end of turn.

“But he was still a good dog, and he saved our lives more than once. I reckon that ought to be worth something.” -Old Yeller